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1问题的提出凸凹模配合间隙与模具的使用时间(冲裁次数)和冲件的断面干净(毛刺大小)及锥度有直接的关系。因此在使用过程中,这种情况得用刃磨来解决。为了延长使用时间就要加厚凹模的厚度尺寸,可是在实际使用过程中,冲件断面由于材料内部金属颗粒在强大压力突然消失的情况下,会有弹性回跳现象,使冲件的断面尺寸比凹模的内径尺寸变大,这时冲件与凹模内壁产生磨损,凹模内孔尺寸逐渐变大,
1 raised the issue of punch and die with the gap between the mold and the use of time (blanking times) and the pieces of the clean section (burr size) and the taper has a direct relationship. Therefore, in use, this situation must be sharpened to solve. In order to extend the use of time to thicken the thickness of the die size, but in actual use, the punch section due to the material within the metal particles suddenly disappear in the case of strong pressure, there will be elastic bounce phenomenon, so that pieces of the cross-section The size of the inner diameter of the die than the size becomes larger, then the punch and the inner wall of the die wear, die cavity size becomes larger,